At the very end of Avengers: Endgame, we see a scene that has the feeling of an epilogue. The camera starts on a suburban street. A red car from the 1940's (which looks brand new) drives by. The camera moves up to a house that has a somewhat-overgrown yard, with untrimmed plants, a few of which are dying. Inside the house, we see that Steve Rogers and Peggy Carter are slowly and romantically dancing together.
I was shocked by the disrepair in the yard. To me, Steve and Peggy would have kept their yard neat and presentable, much like they always keep their appearances neat and presentable.
Is there an in-universe explanation why the front yard had been neglected?